The normal version is optimized for a 0.6 nozzle (perimeters only; prints really fast). The small version is optimized for a 0.4 nozzle (model files ending in -small).

The only necessary support is already built in (only for the bottom part). For the top part, the bottom two rows should be printed with a transparent filament and then (at the start of the third row) change to the desired color (see picture). Please print the bottom part with a brim. The other two parts can be printed as they are.

All parts can be easily plugged into each other. For the final assembly (after attaching a matrix led and running the cables) I would glue the parts. Last but not least paint it.

The large aka normal version can and was printed on a Prusa MINI+.

Want an even bigger version? All normal parts scaled to 133% should work fine for a 0.8 nozzle - but no guarantee ;-)